package servlet;

import facade.DesarrolloHumanoFacade;
import facade.exception.NotAcompananteFoundException;
import java.io.IOException;
import java.io.OutputStream;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import valueObject.AcompananteVO;
import valueObject.AdjuntoVO;

/**
 *
 * @author dsilva
 */
@WebServlet(name = "MostrarArchivoServlet", urlPatterns = {"/servlet/upload/abrir"})
public class MostrarArchivoServlet extends HttpServlet {

    @EJB
    private DesarrolloHumanoFacade desarrolloHumanoFacade;

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        String $idEntrada = request.getParameter("id");
        int idEntrada = Integer.parseInt($idEntrada);
                
        AcompananteVO acompananteVO;
        try {
            acompananteVO = desarrolloHumanoFacade.findAcompananteById(idEntrada);
        } catch (NotAcompananteFoundException ex) {
            response.setStatus(HttpServletResponse.SC_NOT_FOUND);
            return;
        }
        AdjuntoVO adjunto = acompananteVO.getAdjuntoVO();

        OutputStream out = response.getOutputStream();
        try {
            response.setContentType("application/octet-stream");
            response.setHeader("Content-Disposition", "attachment;filename=" + adjunto.getNombreArchivo().replaceAll(" ", "_")); //preparando el 'download' al navegador

            response.setContentLength(adjunto.getContenido().length);
            out.write(adjunto.getContenido());

        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
